Rolling mill for tubes.



Elmoent'or fl. 1 7 "Gm mass,

3 SEEBTBSHBBT 1.

Patented Apr. 5, 1910.

A. J. MOGINNESS.

ROLLING MILL FOR TUBES.

APPLIUATION IILL'D nmlv, 1008.

A. J. MCG'INNESS.

ROLLING MILL FOR TUBES.

APPLICATION run DEG. 1?. 100a.

Patented Apr. 5, 1910.

3 BKBETS-8HBBT 2.

A. J. MOGINNESS.

ROLLING MILL FOR TUBES.

AYPLIOATION nun DBO. 1'1, 100a.

Patented Apr. 5, 1910.

3 SHEETS-SHEET 3.

ANDIZLW u QRAMM co PNGTD-UINOQRAPNERF. Nlsmncmn uc UNTTED %TATES PATENT@FFTCE.

ANTHONY JOSEPH MQGINNESS, 0F MONESSEN, PENNSYLVANIA.

ROLLING-MILL FOR TUBES.

To all whom it may concern:

Be it known that I, ANTHONY Josern MCGINNESS, a citizen of the UnitedStates of America, residing at Monessen, in the county of \Vestmorelandand State of Pennsylvania, have invented certain new and usefulImprovements in Rolling-Mills for Tubes, of which the following is aspecification, reference being had therein to tilt accompanying drawing.

This invention relates to rolling mills for tubes, and the primaryobject of my in vention is to provide a novel machine for rollingtubular billets or tubes to a requiret gage or size in an economical andexpeditious manner conducive to a high grade of production that can beused for various purposes.

Another object of the invention is to pro vide a machine whereinpositive and reliable means are employed for reducing a tubular billetor tube to a desired interior and exterior diameter and producepractically a seamless tube.

A further object of this invention is to provide a machine comprising aseries of rolls arranged for simultaneously reducing and feeding atubular billet or tube between the rolls, whereby a properly positionedmandrel will affect the interior of the tubular billet or tube, whilethe series of rolls affects the exterior of the billet or tube.

With the above and other objects in View which will more readily appearas the invention is better understood, the same consists in the novelconstruction, combination and arrangement of parts to be hereinafterdescribed and then specifically claimed.

Referring to the drawings :-Figure 1. is a side elevation of the machinepartly broken away, Fig. 2 is a longitudinal seetional view of the same,partly broken away, Fig. 3 is a plan of the machine, partly broken away,Fig. i is a view taken on the line IVIV of Fig. 3, looking toward thereducing rolls, Fig. 5 is a cross sectional view of the reducing rollstaken on the line V-V of Fig. 3, Fig. 6 is a cross sectional view takenon the line VIVI of Fig. 3, Fig. 7 is a cross sectional view taken onthe line VII-VII of Fig. 3, illustrating a train of gears for drivingthe machine, Fig. 8 is a view taken on the line IV-IV of Fig. 3 showinga mandrel clamp forming part of the machine, Fi 9 is a cross sectionalView taken on the line IX-IX of Specification of Letters Patent.

Application filed December 17, 1908.

Patented Apr. 5, 1910.

Serial No. 467,966.

Fig. 3, Fig. 10 is an enlarged detail view of a portion of the mandrelof the machine, Fig. 11 is an enlarged elevation of one of the largereducing rolls of the machine, and Fig. 12 is a similar view of one ofthe small reducing rolls of the machine.

To put my invention into practice, I provide longitudinal parallel bedframes 1 and upon these frames are located two sets of transversehousings, 2 and 3 and i and 5, respectively. Centrally of the housings 2and 3 is journaled a longitudinal drive shaft 6 adapted to be coupled toa suitable source of power, as a motor (not shown). Upon the shaft. (3between the housings are mounted two large gear wheels 7 and S. The gearwheel 7 meshes with a small gear wheel 9 mounted upon a longitudinalshaft 10, journaled longitudinally of the housings 2 and 3. The smallgear wheel 0 meshes with a large gear wheel 11 mounted upon a shaft 12,journaled longitudinally of said housings.

The housings i and 5 are provided with longitudinally alining openings17, said openings in elevation conforming in shape to a Maltese cross.Centrally of each opening is located a stationary guide block 18 havinga circular opening 19 formed therein, and adapted to engage said guideblock 18 are liners 20, and holding said liners in engagement with saidguide block are the inner bearing blocks or brasses 21, which inconjunction with outer bearing blocks or brasses 22 serve as adjustablebearings for the necks 23 of longitudinal rolls 2%, 25. 2(3 and 27. Toadjust the rolls 24: to 27 inclusive, the housings t and 5 are providedwith screws 28 engaging the outer bearing blocks 22.

The rolls 24: to 27 inclusive are provided with wabblers 29, and thesewabblers are connected by coupling sleeves 30 to longitudinal connectingrods 31, which extend to the housing 2 and are connected by couplingsleeves 32 to the inner ends of the shafts 10, 1.2, 14 and 1G. The driveshaft 6 through the medium of the shafts 10, 12, let and 1(3, connectingrods 13, and coupling sleeves 30 and 32 are adapted to revolve the rolls25, 27, 24 and 26 respectively. The rolls 24: and 25 have a diametersmaller than the rolls 26 and 27, and the small rolls 24 and 25 aredisposed one above the other, while the rolls 24; and 27 are in ahorizontal plane. The forward ends of the rolls 24:

serrated, as at 47.

to 27 inclusive are tapered, as at 33, and all of said rolls aredisposed, whereby when the rolls are revolving, a tubular billet or tubewill be fed longitudinally between the rolls. The small rolls 24 and 25which are driven by the shafts 10 and 14 revolve approximately twice asfast as the rolls 26 and 27, and said small rolls are disposeddiagonally between the housings 4 and 5, a few degrees off a verticalplane intersecting the pass between said rolls. The roll 24 is disposedat an angle the reverse of the roll 25, this arrangement of the rollsbeing best shown in Figs. 3 to 5 inclusive of the drawings. The samearrangement is true in connection with the large rolls 26 and 27, withthe exception that these rolls are disposed a few degrees off ahorizontal plane intersecting the pass between said rolls. This angulararrangement of said rolls has a tendency, when said rolls are revolved,to feed a tubular billet or tube through the pass between said rolls,and on account of the position of the shafts 10, 12, 14 and 16, and thedistance between the housing 2 and 5, the con necting rods 31 can beeasily coupled to said shafts and rolls for revolving said rolls withoutsubjecting the connecting rods 31 to any great stress or strain.

To brace the housings 4 and 5, said housings are connected by tie rods34.

Mounted upon the longitudinal bed frames 1 between the housings 2 and 5are brackets 35 supporting a longitudinal trough 36 in alinement withthe openings 19 of the central guide block 18. The trough 36 has a sideextension 37, whereby a tubular billet or tube can be easily placed inthe trough and moved through the guide block 18 of the housing 5.

The bed frames 1 are provided with ex tension frames 38 and mounted uponsaid frames are standards 39 supporting longi' tudinal parallel bearings40. Journaled upon said longitudinal bearings are a plurality oftransverse conical shaped rollers 41, the object of which will presentlyappear.

Arranged upon the extension frames 38 between the rollers 41 and thehousing 4 is a frame, comprising posts 42 connectedby transverse beams43 and 44. Between the beams 43 and 44 is arranged a mandrel clamp, saidclamp comprising two gripping members 45 and 46, the former beingslidably mounted in the beam 43 and the latter in the beams 44. Theconfronting faces of these gripping members are concave and The beam 43is provided with vertical slots 48 and extending through said slots andthe member 45 is a pin 49. Loosely connected to one end of the pin is aslotted lever 50 fulcrumed upon the beam 43, as at 51. Pivotallyconnected to the opposite end of the lever 50 is a link 52, and thislink is pivotally connected to the end of a pin 53 extending through theslotted end of a lever 54 into the member 46. The lever 54 is fulcrumedupon one of the posts 42, at 55, and is provided with a tread plate 56.The lever 54 is also con nected to the post 42 by a coil spring 57, thisspring normally maintaining the tread lever 54 in a horizontal position,and the members 45 and 46 separated, as shown in Fig. 8.

he outer ends of the longitudinal bearings 40 are connected to a frame58 supported by the extension frames 38. The frame 58 is provided with aside bearing 59 for a yoke 60, and slidably mounted in said yoke is ablock 61. Adjustably mounted in the yoke 60 is a screw 62 which isconnected to the outer side or end of the block 61. The opposite side orend of the block 61 is provided with a contracted stem 63 and fittedupon this stem is a tubular mandrel rod 64. This rod extends over therollers 41, between the clamping members 45 and 46, through the housing4 into the pass of the rolls 24 to 27 inclusive. The end of the tubularrod 64 between said rolls is provided with a revolublemandrel head Tohold the yoke 60 in engagement with the frame 58, said yoke is providedwith a keeper 66 adapted to be engaged by a spring-held pivoted lever67.

Operation: Assuming that the machme is in operation, the tubular billetor tube to be operated upon by the machine is placed 1n the trough 36.The tubular billet 1s then moved into the pass between the rolls 24 to27 inclusive, the end of the tubular billet being placed in engagementwith the man drel head 65. As heretofore stated, the rev oluble rolls 24to 27 inclusive will gradually feed the tubular billet through the passbetween said rolls on to the mandrel rod 64. As the tubular billetpasses between the rolls, the rolls in conjunction with the mandrel head65 will perfectly shape the tubular billet, reduce the thickness of thebillet to that extent as to form a seamless tube that will be ejectedfrom the rolls in a finished and polished condition. After the tube haspassed on to the mandrel rod 64 clear of the clamping members, and issupported by the rollers 41, the lever 54 is tread upon tosimultaneously move the clamping members 45 and 46 and grip the mandrelrod 64, whereby said rod will be held stationary. While the lever 54 isheld by one operator, another operator raises the latch 67 to releasethe keeper 66 of the yoke 60, and then said yoke is swung to an openposition, the stem 63 moving out of engagement with the mandrel rod 64.The finished tube 1 surrounds the mandrel rod 64 and resting upon therollers 41 is now drawn lengthwise from the mandrel rod 64, the

yoke 60 closed to support the outer end of the mandrel rod 64, and thenthe lever 54: released. When the lever 54 is released, the mandrel headwill contact with the rolls 25, 2G and 27 and can revolve in the end ofthe mandrel rod 64, but, it is preferable to place another tubularbillet in position while a finished tube is being removed from themandrel rod 64.

I do not care to limit my invention to the specific form of mandrelclamp shown or to the exact manner of removing a finished tube from themandrel rod, and while in the drawings there is illustrated thepreferred embodiments of my invention, I would have it understood thatthe elements therein can be varied or changed as to shape, proportionand manner of assemblage without departing from the spirit of theinvention.

Having now described my invention what I claim as new, is:

1. In a tube rolling machine, tube forming rolls, a mandrel head, a rodsupporting the mandrel head between the rolls, a screw engaging the rodand adapted to adjust the latter longitudinally, a swinging yokesupporting the adjusting screw and a clamping means arranged to engagethe rod at a point adjacent the inner end thereof.

2. In a machine for forming tubes, a set of forming elements adapted toform a tube by rolling pressure exerted over a mandrel head, a mandrelhead carried by a mandrel rod, a means adapted to support said red atits outer end, said supporting means comprising an element capable ofholding the rod in various longitudinally adjusted positions, saidsupporting means also capable of being withdrawn from the rod to permitthe removal of a tube from the latter by a longitudinal movement of thetube relative to the rod and a clamping means adjacent the rolls nearthe inner end of the rod for clamping the rod and holding the same inits various adjusted positions during the removal of the tube.

3. In a tube rolling machine, tube-forming rolls, a mandrel head, a rodsupporting the mandrel head between the rolls, an adjusting screwengaging the red, a swinging yoke supporting the adjusting screw, andclamping means adjacent to the roll near he inner end of the rod forholding the latter in various adjustments during the removal of thetube.

In testimony whereof I aflix my signature in the presence of twowitnesses.

ANTHONY JOSEPH MCGINNESS.

WVitnesses:

MAX H. SnoLovrrz, K. H. BUTLER.

